Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2004-09-27
Phys. Rev. B 71, 012401 (2005)
Physics
Condensed Matter
Strongly Correlated Electrons
4 pages, 2 figures
Scientific paper
10.1103/PhysRevB.71.012401
Thermodynamic characteristics of Fermi systems are investigated in the vicinity of a phase transition where the effective mass diverges and the single-particle spectrum becomes flat. It is demonstrated that at extremely low temperatures $T$, the flattening of the spectrum is reflected in non-Fermi-liquid behavior of the inverse susceptibility $\chi^{-1}(T) \sim T^{\alpha}$ and the specific heat $C(T)/T\sim T^{-\alpha}$, with the critical index $\alpha=2/3$. In the presence of an external static magnetic field $H$, both these quantities are found to exhibit a scaling behavior, e.g. $\chi^{-1}(T,H)=\chi^{-1}(T,0)+ T^{2/3}F(H/T)$, in agreement with available experimental data.
Clark John Willis
Khodel Victor A.
Zverev M. V.
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